ATP Second Round tips: O'Connell's hot streak runs into Ruud roadblock

Christopher O'Connell's recent form line tells a yarn the market might be undervaluing. The Australian, ranked 129th in the world, fronts for Monday's 4:05 am AEST second-round encounter with Casper Ruud riding a four-match winning streak — all victories coming in straight sets or hard-fought three-setters that paint a picture of a bloke finding his rhythm at exactly the right time.

Ruud arrives as the warm favourite despite coming off a loss to Joao Fonseca on Saturday, 8 August. The 17th-ranked Norwegian's class is undeniable — a career win percentage of 65 per cent and 14 career titles — but punters backing him at current odds are banking on reputation over recent output. O'Connell's 3–7 record this season tells one story; his last five starts tell another entirely.

Who wins this second-rounder?

O'Connell's last outing saw him dispatch Kamil Majchrzak in straight sets on Saturday, 15 August — a 6–4, 7–6 victory that capped a remarkable run. Before that, he'd taken out Alexander Shevchenko (6–4, 6–1) on Thursday, 13 August, survived a marathon against Dane Sweeny (6–6, 7–7, 2–5) on Wednesday, 12 August, and earlier posted a win over Jaime Faria (6–6, 6–7, 2–4) on Sunday, 2 August. The lone blemish in his last five was a loss to James Duckworth away on Tuesday, 4 August.

Ruud's form is patchier. That most recent loss to Fonseca — the second time he'd fallen to the Brazilian in consecutive outings on Saturday, 8 August — followed a pair of wins over Juan Manuel Cerundolo on Thursday, 6 August. Further back, he'd dropped a five-setter to Cerundolo on Friday, 17 July. Two wins, three losses across the last five is hardly the form line of a player whose odds suggest dominance.

The pair have never met — their head-to-head record sits at 0–0 — which makes this a fascinating first chapter. Ruud's career pedigree (322–171, with a best ranking of world No. 2) towers over O'Connell's 63–97 mark, but the Australian's current momentum and the Norwegian's recent stumbles tighten this ledger considerably. Our tennis predictions lean toward value on the underdog, even if Ruud's ceiling remains the higher of the two.

Set Handicap: can O'Connell keep it close?

The Set Handicap sits at +/- 1.5 sets, which translates to backing O'Connell to win at least one set or Ruud to sweep in straights. O'Connell's recent record suggests resilience — three of his last four wins went the distance or pushed deep into tiebreaks, indicating he's rarely blown off the court. Ruud, meanwhile, has shown vulnerability: both losses to Fonseca were straight-set affairs (6–3, 7–6), and his five-set battle with Cerundolo points to a player who can be dragged into scraps.

Given O'Connell's ability to extend matches and Ruud's recent inability to close opponents out efficiently, the +1.5 sets on the Australian looks a safer play than the outright upset. Even if class prevails, the form line suggests O'Connell nicks a set somewhere along the way.

Total Games: a long night or a quick exit?

The Total Games line is set at 21.5, and the recent form of both players leans heavily toward longer matches. O'Connell's tiebreak-laden wins and Ruud's tendency to get dragged into extended battles — that Cerundolo five-setter tallied plenty of games — suggest punters should eye the Over.

Neither player has shown the capacity to steamroll opponents in recent outings. O'Connell's competitive spirit and Ruud's patchy serve efficiency (no first-serve percentages in the pack, but the scorelines tell the tale) point toward a match that goes the distance in terms of total games played. Over 21.5 games feels the sharper angle.